Several studies were also performed to include the spinning motion of the compact objects in the analysis. Initial studies extending the classical techniques were done in [1]}, [2]}, which was later extended by [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}, [10]}, [11]}, [12]}, [13]}, [14]}, [15]}. The spin effects were then also included in the PN formalism of GR in [16]}, [17]}, [18]}, [19]}, [20]}, [21]}, [22]}, [23]}, [24]}, [25]}, [26]}, [27]}, [28]}, [29]}, [30]}, [31]}. More recently, quantum scattering amplitudes involving massive particles of arbitrary spin were used to obtain classical spin corrections to the two-body effective potential [32]}, [33]}, [34]}, [35]}, [36]}, [37]}, [38]}, [39]}, [40]}.
See [41]}, [42]}, [43]} for recent reviews and a more comprehensive reference to literature.
